I too was having this problem. I had taken it to the dealer previously for routine service and asked the service tech. to look into it. He said it was normal, nothing they could do. But from reading this board, I knew it was a defect.
Before my next service, I came here, printed off about 30 pages worth of peoples' experiences with the clutch shudder. Went to the dealer, and asked for the service manager. I showed him my documentation - he phoned up SOC, and within a week, I had a brand new clutch, pressure plate etc..
And that was with 17k km. Clutch shudder is now gone.